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Entry 3 senses · 2 variants Webster, 1913

Triennial

/trī-ĕn'-ē-əl/ · Tri·en·ni·al · IPA /tɹaɪˈɛniəl/
01 a. Continuing three years; as, triennial parliaments; a triennial reign.
  1. 1.
    Continuing three years; as, triennial parliaments; a triennial reign.
  2. 2.
    Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation.
02 n. Something which takes place or appears once in three years.
  1. 1.
    Something which takes place or appears once in three years.